I have just bought a Triumph motorcycle and have been doing a bit of detective work. The bike came with a file full of old MoTs, receipts, the owners handbook, service logbook and an HPI report from when the previous owner purchased it. The service logbook shows the correct VIN number but a different registration number to that currently on the bike. I think the first owner must have put a personalised number on it at some point, since the 3 letters of the current number match his initials. The thing that I don't understand is why the HPI report does not mention anything about a change in registration number?